A dongle is a small device that connects to a computer or other electronic device to provide additional functionality or security.
A dongle is a small piece of computer hardware that connects to a port on another device to provide it with additional functionality, or enable a pass-through to such a device that adds functionality. wikipedia
There are 5 main types of USB dongles:
- WiFi dongles
- Bluetooth dongles
- For security
- For memory and storage
- GPS navigation dongles
- HASP dongles